What MJ said. An "I'm interested" note can sometimes push an employer who's still deciding or is so busy s/he doesn't have time to make a decision. I have many times hired the person who appeared to be more interested in me and my organization.
Go for it. If there's something you can do that would let the employer know you're the person for the job, do that.
A person I interviewed sent me, as a followup, a marketing plan he had written based on a conversation we'd had during the interview! "I've been thinking about the project you were telling me about. Here's an outline of how I might approach it and organize it."
This let me know that he could hit the ground running. So guess what? I hired him.
I know I am late to the game on this one as it appears the card has been sent.
One thank you note, mailed within 1 business day of the interview, is appreciated. If I received an actual card, the kind you buy at the Hallmark store, from a candidate, it would not impress me at all.
If there is a second interview, no card is necessary. At that point, you start to seem desperate. A follow up email, or call if no email is available, is appropriate after 5 business days.
NEVER send a gift of any kind. NEVER tell an employer how badly you want/need the job. ALWAYS remind the employer of your greatest asset and why you can help the firm.
As a hiring manager, more than 1 email/letter/card reads less of a "thank you" and more of a "hey did you forget about me? i still want that job" and it's not a good look.
If you impressed them in the interview and have a good resume, leave it be. They'll hire you or they won't, and if they do it won't be because you kept up on your correspondence.
I was surprised that you don't have an e-mail address. It's an important part of job-applying today and your job coach should have told you this. The lack of an e-mail address on a job application says to an employer two things:
1. "The 21st century has passed me by." 2. "I'm too sketchy to have an e-mail address."
You don't want a prospective employer to think either of these things.
You can get a free e-mail account at:
Gmail.com Yahoo.com Hotmail.com AOL.com
Other RfM'ers may have additional suggestions for freebie e-mail accounts.